PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-06:28:10
G01     56.2           28.9                5.1 +/-    0.97       9.2 +/-    0.97  0.040 / 0.040
G06     182.7          14.7                3.3 +/-    1.91       8.2 +/-    1.91  0.060 / 0.040
G07     143.9          18.2                4.8 +/-    1.84      11.0 +/-    1.84  0.020 / 0.020
G11     47.0           20.9                4.5 +/-    2.57       9.7 +/-    2.57  0.020 / 0.020
G13     259.5          33.5                9.7 +/-    1.53      15.8 +/-    1.53  0.060 / 0.090
G15     289.6          16.7                7.7 +/-    1.42      18.3 +/-    1.42  0.070 / 0.080
G17     281.1          78.8                7.3 +/-    0.73       7.4 +/-    0.73  0.120 / 0.250
G19     237.8          55.6                9.1 +/-    1.70      10.8 +/-    1.70  0.130 / 0.230
G28     43.2           55.0                5.5 +/-    2.68       6.5 +/-    2.68  0.130 / 0.130
G30     145.5          46.6                9.1 +/-    0.39      12.0 +/-    0.39  0.050 / 0.130